bleach wins very easily for me for a few simple reasons
PLOT (it has one, instead of evil ninja of the month, or that god dammed orochimaru) anime viewers will understand what were talking about soon enough

and CHARATERS, the characters in bleach are all like us, theres no im evil so im gonna do evil stuff, they are all human with different reasons for doing what they do, like tousen

granted the zabuza arc was the best, but after that it all went downhill and become less about ninjas and more about something else